SOLUTION: Carla invested $28,000, part at 14% and part at 9%. If the total interest at the end of the year is $3,370, how much did she invest at 14%?

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Question 43001: Carla invested $28,000, part at 14% and part at 9%. If the total interest at the end of the year is $3,370, how much did she invest at 14%?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
.14x+.09(28000-x)=3370 or .14x+2520-.09x=3370 or .05x=850 or x=850/.05 or
x=17000 invested @ 14% & 28000-17000=11000 @ 9%